Report on Galunggung (Indonesia) — 21 August-27 August 2002

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 21 August-27 August 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on Galunggung (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 21 August-27 August 2002. Smithsonian Institution and US Geological Survey.

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Galunggung

Indonesia

7.25°S, 108.058°E; summit elev. 2168 m

All times are local (unless otherwise noted)


Based on information from a pilot report, the Darwin VAAC stated that an eruption at Galunggung on 23 August at 1748 produced a W-drifting low-level plume. No ash was visible on satellite imagery.

Geologic Background. The forested slopes Galunggung in western Java are cut by a large horseshoe-shaped caldera breached to the SE that has served to channel the products of recent eruptions in that direction. The "Ten Thousand Hills of Tasikmalaya" dotting the plain below the volcano are debris-avalanche hummocks from the collapse that formed the breached caldera about 4200 years ago. Although historical eruptions, restricted to the central vent near the caldera headwall, have been infrequent, they have caused much devastation. The first historical eruption in 1822 produced pyroclastic flows and lahars that killed over 4000 people. More recently, a strong explosive eruption during 1982-1983 caused severe economic disruption to populated areas near the volcano.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)